Ball bearing for rotor shafts



March-7, 1939. 1 R ANNENv Y BALL BEARING FOR R'oToR sHAFTs wi led Aug.5o, 195i/ E921. iwf/53289 l M I Patented Mari. 1, 1,939A

" the irm Roulements a Billes Miniatures S. A. Bienne, Switzerland, ajoint-stock company o Switzerland Applicationl August 30, 193'1,` SerialNo. 161,664

In Switzerland September 4, 1936 `4, claims. (o1. sos-188) I'hisinvention relates Ato ball bearings for vertical shafts of the kindwhere the inner race is axially displaceable to a limited extentrelatively to the outer race.

' There are certain machines having a rotor subjected to changes of amagnetic flux which act in an axial direction. In such machinesit isimportant that the rotor be capable of yielding toy the effects of said`flux and `to "iioat therein.

Such rotors have been previously provided with bushed bearings becausethe known ball bearings could not beleasily placed iii-electriccounters,

meters Ferrari, motors and the like on account of the thinwalledhousings.

To remedy this', the present invention consists in that the inner raceis constituted by the shaft itself and that 'the outer race and astationary 30 signs of reference refer to similar parts.,

Referring to Fig. l, the inner race is constituted by the verticalaxleor shaft 5. 'I'he balls 3'are 'disposed within a cage I3 and run on saidinner race. The outer race'comprises two rings 2, 2

35 having symmetrically arranged concavesurfaces contacting the ballsand which are fitted into a one-piece jacket member 8 together with arigid abutment plate 1 and a spacing ring .9. The partsare retained inposition by turning over the edges of the Jacket member l. The rigidabutment plate V'I' limits the, axial displacement of the inner racerelatively to the outer race.

At the central portion of the abutment plate 1' upon which the axle orshaft l is adapted to bear a piece of a material different from thatused for said plate 1 may be inserted to serve as a counterpivot blockfor the end of the axle or shaft l. D

In the bearing illustrated in- Mg. 2, which is of yform a self containedunit.

similar construction to the bearing shown in Figure 1 and in whichidentical parts are designated by the same reference numerals, the rigidabutment Vplate 6 is formed with a central aperture through which theshaft or axle 5 passes. 5

'In this construction the axial displacement of the inner race islimited by a shoulder 5' formed on the shaft`5, thev shoulder 5 beingadapted to contact against a part of the abutment plate 6 which hater 1spbnshed for this purpose.

If the axial pressures are )considerablel the bearing according to Fig.3 may be used. 4T'he axial abutment of the shaft 5 comprises a rigidyabutment plate 10 having a cup like central portion receiving the ballsIl.

The washer I located between the ring 2' and the abutment plate'lretains the balls I l on their race when the shaft is displacedupwardly.

A-sleeve 4 hardened and polished and forced upon .the shaft 5 forms theinner race.

What I claim as new is:

vl. In a ball bearing arrangement for rotor shafts controlled by amagnetic flux causing small axial displacements, a vertical shaftconstituting the inner race, a set of balls, a cage holding the 25 ballsin spaced relation, an outer race comprising two rings havingsymmetrically arranged concave surfaces contacting said balls, a spacingring interposed between the said race rings, an abutment member Huntingthe axial movement of the 30 shaft in one direction, and a one piecejacket member surrounding the race rings and uhaving turned over edgesto maintain race rings, spacing ring and abutment member pressedtogether to 2. Ball bearing according to claim 1, in which 3. theabutment member is a solid plate for the end of the shaft.i v

3. Ball bearing according to claim 1, ln which the abutment member is aplane provided with an aperture through which theshait 'passes and isadapted to contact with a shoulder of said ena or tne'snaft.

, ROBERT ANNEN.

